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Registration of ‘CP 85‐1491’ Sugarcane
Author(s) -
Shine J. M.,
Tai P. Y. P.,
Miller J. D.,
Glaz B.,
Deren C. W.,
Comstock J. C.
Publication year - 1994
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1994.0011183x003400050051x
Subject(s) - crop , horticulture , humanities , forestry , geography , biology , art
'CP 85-1491' sugarcane (a complex hybrid ofSaccharum spp.) (Reg. no. CV-98, P1 578051) was selected from progeny of the cross 'CP 75-1553' (1) X 'CP 72-2086' (2) made at Canal Point, FL, in December 1982. CP 85-1491 was developed through cooperative research by the USDA-ARS, the Institute of Food and Agricultural Sciences of the University of Florida, and the Florida Sugar Cane League, Inc., and was released to growers in Florida in the fall of 1992. Stalks of CP 85-1491 are light green under the leaf sheaths, but turn reddish in areas exposed to sunlight. They have a heavy wax bloom and have medium diameter. Averaged over a three-crop cycle (plant cane and first and second ratoon), stalk weight was 1.33 kg, compared with 1.34 and 1.28 kg for the commercial checks 'CP 70-1133' (3) and 'CP 72-1210' (4), respectively. Averaged over 21 replicated yield trials on muck soils (seven locations harvested in plant cane and first and second ratoon), the mean sugar content at early harvest (late October) was 3 % higher than that of CP 70-1133 and CP 72-1210. Early harvest sugar yields (Mg ha") were 6 and 32% higher than those of CP 70-1133 and CP 72-1210, respectively. CP 85-1491 cane yields at regular harvest dates (November-March), was 99% of CP 70-1133 and 29% higher than that of CP 72-1210. At regular harvest dates, its average sugar content (kg sugar Mg" cane) was 4 and 6% higher than CP 70-1133 and CP 72-1210, respectively. Sugar yields for CP 85-1491 averaged 4 and 29% higher than those of CP 70-1133 and CP 72-1210, respectively. CP 85-1491 performed better than CP 70-1133 and CP 72-1210 as measured by the economic index (5) at harvest by 18 and 32%, respectively. Averaged over six replicated yield trials on sand soils (two plant cane, two first ratoon, and two second ratoon), the mean cane yield for CP 85-1491 was 92% of that for CP 70-1133, but was 106% of that of CP 72-1210. Sugar yield at early harvest dates for CP 85-1491 was 97% of that of CP 70-1133, but was 117% of that of CP 72-1210. Sugar content at harvest was essentially equal for all three varieties. Sucrose yields for CP 85-1491 were 92% of those for CP 70-1133, but were 106% of those of CP 72-1210. Since all three cultivars had equal sugar content, the economic index was dependent on their relative cane yield. CP 85-1491 has shown adequate resistance for commercial production in Florida to the sugarcane mosaic virus (Strain E), leaf scald [caused by Xanthomonas albilineans (Ashby) Dowson], eye spot [caused by Bipolaris sacchari (E.J. Butler) Shoemaker], smut (caused by Ustilago scitaminea Syd. & P. Syd.), and rust (caused by Puccinia mekmocephala Syd. & P. Syd.). CP 85-1491 has a millability rating of 0.998 and a fiber content of 10.40%, compared with 0.980 and 10.41% for CP 70-1133 and 0.965 and 10.22% for CP 72-1210. Seedcane of CP 85-1491 will be maintained by the USDAARS at the Sugarcane Field Station, Canal Point, FL.